Well you can guess that I'm going to recomend a truck. A mid 60's Sweptline that's been through a few owners got it's share of rust and dents. They've got enough room under the hood to hide a tunnelram, blower, or turbos without cutting the hood. Also enough room for decent headers and exhaust. Their high center of gravity will also help transfer weight on launch, you can also hide a fuel cell right in front of the rear bumper.
It's not a Mopar but there are a couple great video clips on U-Tube of a '70 Chevy pickup. Look under Farm Truck. The guys got a rusted out dented up, pickup with duct tape covering holes, a coat hanger for an antenna, cracked windshield, one dented hubcap, paper coffee cup on the dash, beat up old topper, and an airhorn from a semi, with a pizza delivery sign on top of the cab. It runs 10.50's@125. Dave